epizoon

Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

n. An epizoic organism.

from Wiktionary, Creative Commons Attribution/Share-Alike License

n. An external animal parasite

from the GNU version of the Collaborative International Dictionary of English

n. One of the artificial group of invertebrates of various kinds, which live parasitically upon the exterior of other animals; an ectozoön. Among them are the lice, ticks, many acari, the lerneans, or fish lice, and other crustaceans.